Robertson is located in Smiley, Texas, in Gonzales County. Gonzales County holds a unique place in Texas history as the birthplace of the Texas Revolution, the "Come and Take It" cannon confrontation of 1835 occurred here, and the county wears that heritage proudly. The city of Gonzales anchors a ranching and agricultural county that has remained authentically Texan through the development waves transforming neighboring counties.

The Guadalupe River flows through the northern part of Gonzales County, providing river frontage properties and water recreation. The terrain transitions from the sandy post oak soils of the northwest to the heavy blackland prairie soils of the southeast, supporting diverse agricultural operations.

Smiley had an estimated population of 533 as of 2023. The 78159 zip code has a median household income of $33,542, a median home value of $73,900, and a median age of 37.1. The average household size is 2.6 people.

Cattle ranching, row crop agriculture, oil and gas production, and a modest manufacturing sector in Gonzales anchor the county economy. River frontage properties on the Guadalupe attract recreational buyers, while the agricultural interior offers productive working ranch land.